Renesas M16C Series User Manual page 85

M30240 Group
Timer Ai register (Note)
(b15)
b7
Count start flag
b7 b6 b5 b4 b3 b2 b1 b0
Up/down flag
b7 b6 b5 b4 b3 b2 b1 b0
Figure 1.61: Timer A-related registers (2)
Rev.1.00 Sep 24, 2003 Page 67 of 360
Symbol
(b8)
TA0
b0 b7 b0
TA1
TA2
TA3
TA4
Function
• Timer mode
Counts an internal count source
• Event counter mode
Counts pulses from an external source or timer overflow
• One-shot timer mode
Counts a one shot width
• Pulse width modulation mode (16-bit PWM)
Functions as a 16-bit pulse width modulator
• Pulse width modulation mode (8-bit PWM)
Timer low-order address functions as an 8-bit
prescaler and high-order address functions as an 8-bit
pulse width modulator
Note: Read and write data in 16-bit units.
Symbol Address
TABSR 0380
16
Bit symbol Bit name
TA0S Timer A0 count start flag
TA1S Timer A1 count start flag
TA2S Timer A2 count start flag
TA3S Timer A3 count start flag
TA4S Timer A4 count start flag
TB0S Timer B0 count start flag
TB1S Timer B1 count start flag
TB2S Timer B2 count start flag
Symbol Address
UDF 0384
16
Bit symbol Bit name
TA0UD Timer A0 up/down flag
TA1UD
Timer A1 up/down flag
TA2UD
Timer A2 up/down flag
TA3UD
Timer A3 up/down flag
TA4UD Timer A4 up/down flag
Timer A2 two-phase pulse
TA2P
signal processing select bit
Timer A3 two-phase pulse
TA3P
signal processing select bit
Timer A4 two-phase pulse
TA4P
signal processing select bit
Address When reset
0387 ,0386 Indeterminate
16 16
0389 ,0388 Indeterminate
16 16
038B ,038A Indeterminate
16 16
038D ,038C Indeterminate
16 16
038F ,038E Indeterminate
16 16
Values that can be set
0000 to FFFF
16 16
0000 to FFFF
16 16
0000 to FFFF
16 16
0000 to FFFE
16 16
00 to FE
16 16
(Both high-order
and low-order
addresses)
When reset
00
16
Function
0 : Stops counting
1 : Starts counting
When reset
00
16
Function
0 : Down count
1 : Up count
This specification becomes valid
when the up/down flag content is
selected for up/down switching
cause
0 : two-phase pulse signal
processing disabled
1 : two-phase pulse signal
processing enabled
When not using the two-phase
pulse signal processing function,
set the select bit to "0"
Timer A
R W
R W
R W